Dinâmica de energia, água e carbono em área de pastagem no semiárido pernambucano
Ano de defesa: | 2014 |
---|---|
Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | , , |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Federal Rural de Pernambuco
|
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Produção Vegetal
|
Departamento: |
Unidade Acadêmica de Serra Talhada
|
País: |
Brasil
|
Palavras-chave em Português: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6940 |
Resumo: | With climate change scenarios indicating increase of air temperature, expected to reduce water resources in many regions of the world, such as the semi-arid northeast, due to the increasing emission of greenhouse gases, including dioxide (CO2), studies investigating the relationship between flows of water, energy and CO2 in agricultural ecosystems are of fundamental importance to understand the effect of climate change on agriculture. The eddy covariance (EC) is a method that provides high temporal resolution measurements of fluxes of energy, water and CO2 between the surface and the atmosphere and in recent years has been considered the standard tool this type of study. Thus the present study aimed to i) evaluate the seasonal variation of the flows of energy, water and carbon; ii) verify the energy partitioning and water; iii) quantify the degree to which environmental factors affect the daily and seasonal patterns of evapotranspiration iv) relate the flow of CO2 with plant growth and v) determine the components of the water balance. Between January 2012 and December 2013, flux measurements of sensible heat (H), latent heat (LE) and carbon (FCO2) emissions were performed by the eddy covariance method in a pasture in the semiarid region of Pernambuco. Besides these measures, the monitoring of rainfall (P), the change in water storage (DA) and runoff (ES) to determine the water balance were performed. Plant measurements and NDVI (Normalized Difference Vegetation Index) were quantified for tracks changes in phenology and vegetation activity. Regression analyzes were performed to assess the relationship between variables. P values in the two years of study were lower than normal climatology of the region. The average air temperature in 2013 increased by 0.66 ◦C compared to 2012. It was observed that the fraction H/Rn increased the wet to the dry season period and all years. H was superior to the LE, except for periods of occurrence of significant events of P. The Priestley-Taylor’s constant (a) indicated that the water storage in the soil affected the evapotranspiration (ET) during almost the whole time. The majority of P was transferred to the atmosphere via ET, followed by runoff (ES), which together totaled over 77% of P. The integration of carbon flow data indicated an average absorption by the ecosystem equivalent to 2.15 Mg C ha−1 yr−1. |
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SOUZA, Eduardo Soares deANTONINO, Antônio Celso DantasLIMA, José Romualdo de SousaOMETTO, Jean Pierre Henry BalbaudSILVA, Thieres George Freire daBARROS JÚNIOR, Genivalhttp://lattes.cnpq.br/4486320338778858SOUZA, Rodolfo Marcondes Silva2017-05-22T15:16:43Z2014-02-20SOUZA, Rodolfo Marcondes Silva. Dinâmica de energia, água e carbono em área de pastagem no semiárido pernambucano. 2014. 61 f. Dissertação (Programa de Pós-Graduação em Produção Vegetal) - Universidade Federal Rural de Pernambuco, Serra Talhada.http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6940With climate change scenarios indicating increase of air temperature, expected to reduce water resources in many regions of the world, such as the semi-arid northeast, due to the increasing emission of greenhouse gases, including dioxide (CO2), studies investigating the relationship between flows of water, energy and CO2 in agricultural ecosystems are of fundamental importance to understand the effect of climate change on agriculture. The eddy covariance (EC) is a method that provides high temporal resolution measurements of fluxes of energy, water and CO2 between the surface and the atmosphere and in recent years has been considered the standard tool this type of study. Thus the present study aimed to i) evaluate the seasonal variation of the flows of energy, water and carbon; ii) verify the energy partitioning and water; iii) quantify the degree to which environmental factors affect the daily and seasonal patterns of evapotranspiration iv) relate the flow of CO2 with plant growth and v) determine the components of the water balance. Between January 2012 and December 2013, flux measurements of sensible heat (H), latent heat (LE) and carbon (FCO2) emissions were performed by the eddy covariance method in a pasture in the semiarid region of Pernambuco. Besides these measures, the monitoring of rainfall (P), the change in water storage (DA) and runoff (ES) to determine the water balance were performed. Plant measurements and NDVI (Normalized Difference Vegetation Index) were quantified for tracks changes in phenology and vegetation activity. Regression analyzes were performed to assess the relationship between variables. P values in the two years of study were lower than normal climatology of the region. The average air temperature in 2013 increased by 0.66 ◦C compared to 2012. It was observed that the fraction H/Rn increased the wet to the dry season period and all years. H was superior to the LE, except for periods of occurrence of significant events of P. The Priestley-Taylor’s constant (a) indicated that the water storage in the soil affected the evapotranspiration (ET) during almost the whole time. The majority of P was transferred to the atmosphere via ET, followed by runoff (ES), which together totaled over 77% of P. The integration of carbon flow data indicated an average absorption by the ecosystem equivalent to 2.15 Mg C ha−1 yr−1.Com os cenários de mudanças climáticas apontando aumento da temperatura do ar, com previsão de redução dos recursos hídricos de várias regiões do mundo, a exemplo do semiárido nordestino, em decorrência do crescente aumento da emissão de gases de efeito estufa, dentre eles o dióxido de carbono (CO2), estudos que investiguem a relação entre os fluxos de água, energia e CO2 de ecossistemas agrícolas são de fundamental importância para se compreender o efeito das mudanças climáticas na agricultura. A covariância dos vórtices turbulentos (Eddy Covariance – EC) é um método que fornece alta resolução temporal de medições fluxos de energia, água e CO2 entre a superfície e a atmosfera e nos últimos anos tem sido considerado a ferramenta padrão desse tipo de estudo. Desse modo o presente trabalho teve como objetivos i) avaliar a variação sazonal dos fluxos de energia, água e carbono; ii) verificar o particionamento energia e água iii) quantificar o grau com que os fatores ambientais afetam os padrões diários e sazonais da evapotranspiração iv) relacionar o fluxo de CO2 com o crescimento vegetal e v) determinar os componentes do balanço hídrico. Entre janeiro de 2012 e dezembro de 2013, medidas de fluxos de calor sensível (H), calor latente (LE) e dióxido de carbono FCO2 foram realizados pelo método da covariância de vórtices turbulentos em uma área de pastagem no semiárido de Pernambuco. Além dessas medidas, foram realizados os monitoramento da precipitação pluviométrica (P), da variação no armazenamento de água (DA) e do escoamento superficial (ES) para determinação do balanço hídrico. Medidas de planta e o NDVI (Índice de Vegetação por Diferença Normalizada) foram quantificados para acompanha as mudanças na fenologia e a atividade da vegetação. Análises de regressão foram realizadas para avaliar a relação entre as variáveis. Os valores de P nos dois anos de estudo foram inferiores a normal climatológica da região. A temperatura média do ar em 2013 aumentou 0,66 ◦C em comparação a 2012. Foi observado que a fração H/Rn aumentou do período úmido para o período seco, e em todos os períodos H foi superior ao LE, com exceção dos períodos com ocorrência de significativos eventos de P. A constante de Priestley-Taylor (a) indicou que o armazenamento de água no solo controlou a evapotranspiração (ET) durante quase todo momento. A maior parte de P foi transferida para a atmosfera via ET, seguida do escoamento superficial (ES), que juntos somaram mais de 77% de P. A integração dos dados do fluxo de carbono indicou uma absorção média pelo ecossistema equivalente a 2,15 Mg C ha−1 ano−1.Submitted by Mario BC (mario@bc.ufrpe.br) on 2017-05-22T15:16:43Z No. of bitstreams: 1 Rodolfo Marcondes Silva Souza.pdf: 2825721 bytes, checksum: 36c0557b377a4bd890e197c4bb4ce70c (MD5)Made available in DSpace on 2017-05-22T15:16:43Z (GMT). No. of bitstreams: 1 Rodolfo Marcondes Silva Souza.pdf: 2825721 bytes, checksum: 36c0557b377a4bd890e197c4bb4ce70c (MD5) Previous issue date: 2014-02-20Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESConselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPqapplication/pdfporUniversidade Federal Rural de PernambucoPrograma de Pós-Graduação em Produção VegetalUFRPEBrasilUnidade Acadêmica de Serra TalhadaVariação sazonalFluxo de energiaFluxo de águaFluxo de carbonoPastagemFITOTECNIA::MELHORAMENTO VEGETALDinâmica de energia, água e carbono em área de pastagem no semiárido pernambucanoinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis-1747323715939935130600600600600600-696890503755266288426156072994701319672075167498588264571-2555911436985713659info:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da UFRPEinstname:Universidade Federal Rural de Pernambuco (UFRPE)instacron:UFRPELICENSElicense.txtlicense.txttext/plain; charset=utf-82165http://www.tede2.ufrpe.br:8080/tede2/bitstream/tede2/6940/1/license.txtbd3efa91386c1718a7f26a329fdcb468MD51ORIGINALRodolfo Marcondes Silva Souza.pdfRodolfo Marcondes Silva Souza.pdfapplication/pdf2825721http://www.tede2.ufrpe.br:8080/tede2/bitstream/tede2/6940/2/Rodolfo+Marcondes+Silva+Souza.pdf36c0557b377a4bd890e197c4bb4ce70cMD52tede2/69402017-05-22 12:16:43.86oai:tede2: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Biblioteca Digital de Teses e Dissertaçõeshttp://www.tede2.ufrpe.br:8080/tede/PUBhttp://www.tede2.ufrpe.br:8080/oai/requestbdtd@ufrpe.br ||bdtd@ufrpe.bropendoar:2017-05-22T15:16:43Biblioteca Digital de Teses e Dissertações da UFRPE - Universidade Federal Rural de Pernambuco (UFRPE)false |
dc.title.por.fl_str_mv |
Dinâmica de energia, água e carbono em área de pastagem no semiárido pernambucano |
title |
Dinâmica de energia, água e carbono em área de pastagem no semiárido pernambucano |
spellingShingle |
Dinâmica de energia, água e carbono em área de pastagem no semiárido pernambucano SOUZA, Rodolfo Marcondes Silva Variação sazonal Fluxo de energia Fluxo de água Fluxo de carbono Pastagem FITOTECNIA::MELHORAMENTO VEGETAL |
title_short |
Dinâmica de energia, água e carbono em área de pastagem no semiárido pernambucano |
title_full |
Dinâmica de energia, água e carbono em área de pastagem no semiárido pernambucano |
title_fullStr |
Dinâmica de energia, água e carbono em área de pastagem no semiárido pernambucano |
title_full_unstemmed |
Dinâmica de energia, água e carbono em área de pastagem no semiárido pernambucano |
title_sort |
Dinâmica de energia, água e carbono em área de pastagem no semiárido pernambucano |
author |
SOUZA, Rodolfo Marcondes Silva |
author_facet |
SOUZA, Rodolfo Marcondes Silva |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
SOUZA, Eduardo Soares de |
dc.contributor.advisor-co1.fl_str_mv |
ANTONINO, Antônio Celso Dantas |
dc.contributor.advisor-co2.fl_str_mv |
LIMA, José Romualdo de Sousa |
dc.contributor.referee1.fl_str_mv |
OMETTO, Jean Pierre Henry Balbaud |
dc.contributor.referee2.fl_str_mv |
SILVA, Thieres George Freire da |
dc.contributor.referee3.fl_str_mv |
BARROS JÚNIOR, Genival |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/4486320338778858 |
dc.contributor.author.fl_str_mv |
SOUZA, Rodolfo Marcondes Silva |
contributor_str_mv |
SOUZA, Eduardo Soares de ANTONINO, Antônio Celso Dantas LIMA, José Romualdo de Sousa OMETTO, Jean Pierre Henry Balbaud SILVA, Thieres George Freire da BARROS JÚNIOR, Genival |
dc.subject.por.fl_str_mv |
Variação sazonal Fluxo de energia Fluxo de água Fluxo de carbono Pastagem |
topic |
Variação sazonal Fluxo de energia Fluxo de água Fluxo de carbono Pastagem FITOTECNIA::MELHORAMENTO VEGETAL |
dc.subject.cnpq.fl_str_mv |
FITOTECNIA::MELHORAMENTO VEGETAL |
description |
With climate change scenarios indicating increase of air temperature, expected to reduce water resources in many regions of the world, such as the semi-arid northeast, due to the increasing emission of greenhouse gases, including dioxide (CO2), studies investigating the relationship between flows of water, energy and CO2 in agricultural ecosystems are of fundamental importance to understand the effect of climate change on agriculture. The eddy covariance (EC) is a method that provides high temporal resolution measurements of fluxes of energy, water and CO2 between the surface and the atmosphere and in recent years has been considered the standard tool this type of study. Thus the present study aimed to i) evaluate the seasonal variation of the flows of energy, water and carbon; ii) verify the energy partitioning and water; iii) quantify the degree to which environmental factors affect the daily and seasonal patterns of evapotranspiration iv) relate the flow of CO2 with plant growth and v) determine the components of the water balance. Between January 2012 and December 2013, flux measurements of sensible heat (H), latent heat (LE) and carbon (FCO2) emissions were performed by the eddy covariance method in a pasture in the semiarid region of Pernambuco. Besides these measures, the monitoring of rainfall (P), the change in water storage (DA) and runoff (ES) to determine the water balance were performed. Plant measurements and NDVI (Normalized Difference Vegetation Index) were quantified for tracks changes in phenology and vegetation activity. Regression analyzes were performed to assess the relationship between variables. P values in the two years of study were lower than normal climatology of the region. The average air temperature in 2013 increased by 0.66 ◦C compared to 2012. It was observed that the fraction H/Rn increased the wet to the dry season period and all years. H was superior to the LE, except for periods of occurrence of significant events of P. The Priestley-Taylor’s constant (a) indicated that the water storage in the soil affected the evapotranspiration (ET) during almost the whole time. The majority of P was transferred to the atmosphere via ET, followed by runoff (ES), which together totaled over 77% of P. The integration of carbon flow data indicated an average absorption by the ecosystem equivalent to 2.15 Mg C ha−1 yr−1. |
publishDate |
2014 |
dc.date.issued.fl_str_mv |
2014-02-20 |
dc.date.accessioned.fl_str_mv |
2017-05-22T15:16:43Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
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publishedVersion |
dc.identifier.citation.fl_str_mv |
SOUZA, Rodolfo Marcondes Silva. Dinâmica de energia, água e carbono em área de pastagem no semiárido pernambucano. 2014. 61 f. Dissertação (Programa de Pós-Graduação em Produção Vegetal) - Universidade Federal Rural de Pernambuco, Serra Talhada. |
dc.identifier.uri.fl_str_mv |
http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6940 |
identifier_str_mv |
SOUZA, Rodolfo Marcondes Silva. Dinâmica de energia, água e carbono em área de pastagem no semiárido pernambucano. 2014. 61 f. Dissertação (Programa de Pós-Graduação em Produção Vegetal) - Universidade Federal Rural de Pernambuco, Serra Talhada. |
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UFRPE |
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Universidade Federal Rural de Pernambuco |
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